JPS6486345A - Method for inspecting metallic master disk for optical disk - Google Patents

Method for inspecting metallic master disk for optical disk

Info

Publication number
JPS6486345A
JPS6486345A JP24252687A JP24252687A JPS6486345A JP S6486345 A JPS6486345 A JP S6486345A JP 24252687 A JP24252687 A JP 24252687A JP 24252687 A JP24252687 A JP 24252687A JP S6486345 A JPS6486345 A JP S6486345A
Authority
JP
Japan
Prior art keywords
disk
master disk
metallic master
layer
transparent plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP24252687A
Other languages
Japanese (ja)
Inventor
Makoto Itonaga
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Victor Company of Japan Ltd
Original Assignee
Victor Company of Japan Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Victor Company of Japan Ltd filed Critical Victor Company of Japan Ltd
Priority to JP24252687A priority Critical patent/JPS6486345A/en
Publication of JPS6486345A publication Critical patent/JPS6486345A/en
Pending legal-status Critical Current

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  • Manufacturing Optical Record Carriers (AREA)

Abstract

PURPOSE:To enable inspection under optically the same conditions as the conditions for a finished disk by inspecting the reproduction characteristics of a metallic master disk in the state of attaching a tentative layer having the optical characteristics nearly equal to the optical characteristics of a substrate of an optical disk to said master disk. CONSTITUTION:A transparent plate 4 is disposed and pressed onto a UV curing type resin 3 of the metallic master disk 1 and UV rays are projected thereto to cure the UV curing type resin 3 so that the transparent plate 4 is stuck to the metallic master disk 1. The transparent plate 4 serves as the tentative layer selected to have the refractive index and thickness nearly equal to the refractive index and thickness of the layer of the finished disk substrate. The metallic master disk 1 attached with the tentative layer is irradiated with the laser light under rotation, by which the recording signal on the metallic master disk 1 is reproduced. Only the nondefective disk is subjected to the removal of the tentative layer and is sent to the ensuing press stage where the disk is subjected to pressing with a press. The reproduction signal of the level equal to the level of the finished level is thereby obtd. and the exact results of the inspection are obtd.
JP24252687A 1987-09-29 1987-09-29 Method for inspecting metallic master disk for optical disk Pending JPS6486345A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24252687A JPS6486345A (en) 1987-09-29 1987-09-29 Method for inspecting metallic master disk for optical disk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24252687A JPS6486345A (en) 1987-09-29 1987-09-29 Method for inspecting metallic master disk for optical disk

Publications (1)

Publication Number Publication Date
JPS6486345A true JPS6486345A (en) 1989-03-31

Family

ID=17090424

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24252687A Pending JPS6486345A (en) 1987-09-29 1987-09-29 Method for inspecting metallic master disk for optical disk

Country Status (1)

Country Link
JP (1) JPS6486345A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6977052B1 (en) * 2002-01-18 2005-12-20 Imation Corp Check disk for optical data storage disk manufacturing

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6977052B1 (en) * 2002-01-18 2005-12-20 Imation Corp Check disk for optical data storage disk manufacturing

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